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A
System diagram: Installation example
Manual air vent valve
Collector array
Heating circuit shown
safety device!
HF
Alternative
reheating
(boiler)
Safety assembly in accordance with DIN 1988
B
Temperature sensor
with heat-conducting paste
Thermal insulation
Roof outlet/duct
(corrugated hose)
Heat transfer medium
(direction of flow)
Collector sensor well
Threaded fitting
Minimum insulation thickness for
pipework to EnEV [Germany]
Internal diameter of the pipework/valves
to 20
above 20 to 35
from 40 to 100
above 100
For insulation material with a different thermal resistance, re-calculate the thickness of the
insulating layer.
Temperature sensor in the collector sensor well
Control unit
HR
Cylinder
Minimum thickness of the insulating layer, relative
to a thermal resistance of 0.035 W/(mK) at 40 °C
20
30
identical DN
100
SOKI
Collector
Expansion vessel
Pump with integral
system air vent valve
Shut-off valve for:
- filling
- draining
- flushing
Nominal flow rate
The flow rate should be 50
collector.
No. of
Flow rate
collectors
l/h
1
50 - 80
2
100 - 160
3
150 - 240
4
200 - 320
6
300 - 480
Up to three collectors can be connected in
series. All collector arrays must be connected
in parallel.
Thermal insulation
Use temperature and UV-resistant insulating
material to provide thermal insulation for
the external pipes:
—
Mineral wool backed by aluminium
mesh foil
—
Flexible EPDM hose (e.g. types like
Aeroflex®, Armaflex®)
It is advisable to used a fixed armour made
of aluminium sheet for the mineral wool.
The EPDM hose can be finished with UV-
resistant paint. Where required, protect the
thermal insulation against bird or rodent
attack. Insulate all pipes in accordance with
EnEV2002, appendix 5; e.g. for a DN 20 pipe
with thermal resistance of λ = 0.035 W/ (mK),
select a minimum thickness of d = 20 mm.
Apply the thermal insulation after pressure
testing and checking the system for leaks.
Cylinder
In a standard solar heating system, the
collectors connected in series are linked
to the solar cylinder. Observe the cylinder
installation instructions.
Cylinder temperature sensor
The cylinder sensor is fitted in the immersion
pipe of the lower internal indirect coil in the
cylinder. The sensor is coated with heat-
conducting paste and is pushed as far as it
will go into the immersion tube. The sensor,
including the lead, must be properly secured
(e.g. cable tie).
80 l/h per
–
l/min
0.8 - 1.3
1.7 - 2.7
2.5 - 4
3.3 - 5.3
5 - 8
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